Truck scraper



Nov. 6, 1956 Filed Nov. 6, 1953 Fig./

J. OSE 2,769,256

TRUCK SCRAPER I5 Sheets-Sheet 1 Fig.5

,Jo/m Ose INVENTOR.

J. OSE

TRUCK SCRAPER Nov. 6, 1956 5 Sheets-Sheet 5 Filed Nov. 6, 1953 United States Patent TRUCK 'SCRAPER John Os-e, Granite Falls, Minn.

Application November 6, 1953, Serial No. 390,483

3 Claims. (Cl. 37126) This invention relates generally to earth moving equipment and pertains more particularly to an improved form of scraper.

A primary object of this invention is to provide an improved form of scraper mechanism which is operable with equal facility in both a forward and a rearward direction, thus eliminating the necessity of turning the scraper for movement between the loading and discharge points.

Another object of this invention is to provide an improved form of scraper mechanism which has an improved form of bowl mechanism.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a plan view of the improved scraper :assembly;

Figure 2 is a side elevational view of the assembly shown in Figure 1;

Figure 3 is a longitudinal section taken through the scraper assembly showing the same in loading position;

Figure 4 is a transverse vertical section taken substantially along the plane of section line 4-4 in Figure 2 showing details of the internal construction of the bowl assembly;

Figure 5 is a side elevationalviewshowing a portion of the assembly and showing the steering mechanism therefor; and

Figure 6 is a perspective view of the front apron or door assembly.

Referring now more particularly to the drawings, the earth mover has front and rear sections 10 and 12, respectively, the front section being supported in part by the steerable wheels 14 connected to the front end of this frame section and the rear section being supported in part by the driven wheels 16 in the manner shown. The two sections are pivotally interconnected about a transverse horizontal axis extending through the pivot pin members 18 and the hydraulic system and cylinder assembly 20 is provided for selectively adjusting the angular disposition between the front and rear sections to raise and lower the bowl assembly 22 from a lower earth loading position to a raised transporting position.

The forward frame section is of generally yoke-like configuration and includes the trailing arm members 24 and 26 for connection to the previously mentioned pin members 18 at their rearward or free end. The forward portion of this frame section terminates in the closely spaced side frame members 28 and 30 which are connected to the arm members 24 and 26 through the medium of the converging portions 32 and 34, respectively. Additionally, suitable cross frame members 36 and longitudinal braces 38 may be provided for strengthening the frame.

The rear section includes the generally box-like forward end portion having the opposed side frame portions 40 and end portions 42 and rearwardly extending parallel frame rails 44 between which the engine assembly 46 is supported in the manner shown. Additionally, upwardly inclined brace members 48 may be provided for attachment to the rear wall portion of the previously mentioned bowl assembly 22 and a transverse brace across the ends of rails 44. At one side of the rear portion of the frame there is an operators seat 50 and the power assembly which includes a conventional change speed transmission 52. The extreme rearward portion of the frame has a reversible transmission mechanism 54 connected to the change speed transmission 52 by a short drive shaft 56, and a forwardly extending drive shaft assembly 58 extends from the reversible transmission to the differential assembly 60 for driving the rear wheels 16.

Depending from the frame member 42 adjacent each of the side frame members 44 are uprights 42, the lower ends of the uprights being connected to the rails 44. At least a portion of the rails extend in spaced parallel relation to corresponding side frame members 44. The opposite ends of the differential assembly extend between the members 44 and 44 in the manner shown most clearly in Figure 3. Blocks 46' are attached securely to the differential with their respective upper and lower ends in engagement with the members 44 and 44. Blocks 46 and the members 44 and 44 are interengaged to provide lateral stability between the differential and associated Wheels on the one hand and the frame of the machine on the other. In this respect, it will be noted that the previously mentioned drive shaft assembly 58 is of the extensible type, that is, it has a splined shaft slidably but non-rotatably received in an internally splined sleeve. Therefore, the differential and associated wheels 16 are movable longitudinally of the frame. To offset the movement and maintain proper positioning of the driving wheel assemblage, a pair of fluid motors A are provided, these motors being piston and cylinder arrangements connected between the uprights 42 and the blocks 46'.

The motors are under control of the machine operator so that the wheel base of the machine may be varied at will.

By this construction, the percentage of load resting upon the respective front and rear wheel axle assemblies may be varied to not only suit the conditions of terrain (i. e. more weight would be desirable on the rear axle under some weather and ground conditions), but also to comply with requirements of load as regards vehicular trafiic on public highways.

The steering wheel 62 is provided adjacent the operators seat 50 and this steering Wheel is rotatably supported on the earth mover through a column shaft 64 journaled in the bracket member 66 and provided at its free end with a sprocket 64 over which the chain 68 is trained. The chain is also trained about a sprocket 68' secured to a shaft member '70 that is rotatably supported as by brackets 72 at one side of the bowl assembly 22. Shaft 74 extends forwardly therefrom and is connected thereto by a suitable universal joint 76, the forward end of this latter shaft 74 being connected by a further universal joint 78 to a shaft 80 journaled as through brackets 82 on the front section side frame member 32. The shaft 80 is in turn connected by the universal joint 84 to a steering shaft member formed within a fixed steering column sleeve 86 for association with the steering sector assembly 88 for actuating a pitman arm to impart steering motion to the front wheels 14.

The bowl assembly 22 has a rear wall 90, a front wall 92, opposed side walls 24 and a bottom member 96, an intermediate portion of the bottom 96 being inclined downwardly to form a scraper portion 98 for engagement with the earth surface for scooping earth into the interior of the bowl. The forward end of the bowl is open for this purpose. A door assembly 100 including a plate-like main body portion 102 having an inclined portion 104 formed at its lower edge and provided with rearwardly extending arm members 106 extending from its upper edge and pivotally secured at their free end portion as by pins 108 to the interior of the scraper, is provided for selectively opening and enclosing the opening at the forward end of the bowl. As shown in full lines in Figure 3, when the assembly 100 is raised the apron portion 104 thereof is in face to face contact with the inner face of the forward wall 92 of the bowl and when the assembly is swung downwardly under its own weight it will assume the position of the dotted lines in this figure wherein the lower edge of the apron portion 194 is in engagement with the scraper portion 98. The raising and lowering of the assembly 100 is accomplished by a transverse cylinder member 110 including the extensible piston rod 112 connected to a flexible cable 114 at its free end, the cable extending over pulley members 116 and 118 carried by the bowl and secured at its free end to the assembly 100 adjacent the juncture between the main body portion 102 and the apron portion 104. When the piston rod 112 is extended, the assembly 109 will be raised to full line position in Figure 3 and when the piston rod is retracted, the apron assembly will fall by it own weight to the dotted line position shown.

An ejector plate 120 is disposed transversely within the bowl assembly and is provided at its rear face with pairs of spaced ear members 122 connected by pins 124 to the piston rod 126 of the jack assemblies 128 which are secured to the rear frame section of the assembly. By manipulation of these jack assemblies ejector plate 120 will be moved from the full to the dotted line positions in Figure 3 for ejecting dirt from within the bowl assembly outwardly thereof to its forward opening when the assembly 100 is in the open position.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. An earth mover comprising a front and a rear section, a front and a rear wheel assembly supporting respectively said front and rear sections, a bowl secured to the forward part of said rear section, said bowl being open at its lower forward portion, a door pivoted within the bowl and movable to a position for closing the bowl. opening, said front and rear frame sections being articulately connected, jack means secured on the front section for raising and lowering said bowl, and means for moving said rear wheel assembly to selected longitiudinal positions on said rear frame section.

2. An earth mover comprising a front and rear frame section, front and rear wheel assemblies supporting respectively said front and rear frame sections, a bowl secured to the forward portion of said rear section, said bowl being open at its lower forward portion, a door pivoted within the bowl and movable to a position for closing the bowl opening, said front and rear frame sections being articulately connected, jack means secured on the front section for raising and lowering said bowl, said rear frame section including a pair of side frame members and rail members disposed in spaced parallel relation therebelow, blocks slidably disposed between said side frame members and said rails and rigidly secured to said rear wheel assembly, and means for moving the said blocks and rear wheel assembly to selected longitudinal positions on the rear frame section.

3. An earth mover comprising front and rear frame sections, front and rear Wheel assemblies supporting said front and rear frame sections respectively, a bowl secured to the forward portion of said rear section, said bowl being open at its forward lower portion, a door pivoted within the bowl and movable to a position for closing the bowl opening, said front and rear frame sections being articulately connected, jack means secured on the front section for raising and lowering said bowl, said rear frame section including a pair of side frame members and rail members disposed in spaced parallel relation therebelow, blocks slidably disposed between said side frame members and said rail members and rigidly secured to said References Cited in the file of this patent UNITED STATES PATENTS 2,249,356 Goodman July 15, 1941 2,252,763 French Aug. 19, 1941 2,395,334 Lichtenberg Feb. 19, 1946 2,573,720 Lichtenberg Nov. 6, 1951 

